The aFe 46-31008 is a serrated/helix-entry 6061-T6 aluminum spacer for the exact E46 M54 2.5L 325 applications below. It adds one gasket at the manifold side while retaining the throttle body’s own sealing arrangement; the coupe and sedan/wagon year ranges differ.
| Years / source scope | Model | Exact requirements |
|---|---|---|
| 2001–2005 | BMW 325i / 325xi E46 | M54 2.5L inline-six |
| 2001–2006 | BMW 325Ci E46 | M54 2.5L inline-six; later year does not extend 325i/xi |
46-31008: The exact manual distinguishes 325i/325xi through 2005 from 325Ci through 2006. Existing ranges already match and are retained; Base pseudo-trims are normalized without adding engines, body generations or years. A later BMW carrying a 325 name does not establish M54/E46 compatibility.
| Detail | Value |
|---|---|
| Manufacturer Part Number | 46-31008 |
| Material / design | 6061-T6 billet aluminum; serrated/helix entry |
| Engine / application | See exact engine-specific fitment table and source qualifications |
| Sealing arrangement | One supplied gasket at plastic manifold/spacer interface; throttle body’s own gasket seals other side. |
| Throttle-body fastening | Exact manual:10 Nm (7.4 ft-lb) for supplied throttle-body screws. |
| Emissions scope | The current exact page cites D-550-11. Its full exact application exhibit has not been certified in this batch; the reference alone is not blanket legal certification. Follow the manual’s applicable EO-label requirement. |
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
A model- and engine-specific Silver Bullet throttle-body spacer, not a complete intake or replacement throttle body.
Does it include a filter or coupling?The exact parts list below governs. Generic manufacturer page fields do not establish a supplied intake filter or coupling for this spacer.
Are gains guaranteed?No. Turbulence, throttle-response and whistle statements are manufacturer design claims, not guaranteed horsepower, fuel-economy or sound results for the actual engine.
Which sealing parts are used?One supplied gasket at plastic manifold/spacer interface; throttle body’s own gasket seals other side.
What is the correct torque?Exact manual:10 Nm (7.4 ft-lb) for supplied throttle-body screws.
Are all original search rows certified?The exact manual distinguishes 325i/325xi through 2005 from 325Ci through 2006. Existing ranges already match and are retained; Base pseudo-trims are normalized without adding engines, body generations or years. A later BMW carrying a 325 name does not establish M54/E46 compatibility.
Can another spacer’s instructions be substituted?No. Gaskets, O-rings, brackets, screw sizes, control cables and intake restrictions differ by exact part number.
Does the EO reference cover every application?The current exact page cites D-550-11. Its full exact application exhibit has not been certified in this batch; the reference alone is not blanket legal certification. Follow the manual’s applicable EO-label requirement.
46-31008: installation details and any unresolved source scope must be matched to the actual vehicle before use.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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